Trust me mate,you would be better using them as summer wheels only.I have a set on mine,they are just over 12 months old and one of the front wheels is marked were water has got under the laquer.
What have you done with your original wheels?
As people have said put a good sealant on them before fitting them.Buy yoursef a good wheel brush,I have the EZ Detail brush it will clean to the back of the rim.As for tyre dressing Blackfire is good but not cheap,it lasts ages.Also you need a good no acidic wheel cleaner like Billberry.
Do all that and you should be fine,having said that I have and still have a marked alloy.